"I'm not even sure this isn't all just a big nightmare," warehouse owner Aaron Fechter said.

Fechter said he wished the explosion never happened, but he's happy no one was hurt.

"It was an accident that involved a bad cylinder," Fechter said.

Fechter called it a high-pressure cylinder full of an experimental cooking fuel.

"Our designer cooking fuel that we invented and we've been making it here in experimental quantities, and one of the cylinders blew up," Fechter said.

Fechter said he's an inventor, and the building is where he works. He's been seen on YouTube grilling burgers with a cooking fuel called carbohydrylium.

It's not known if that was the same fuel that exploded, and Fechter wouldn't say more and was too distraught to talk.

Workers in the high-rise next door said they felt the ground shake.

"It felt like a small earth tremor, so we all knew. It sounded like something exploded," a witness said. "We knew something happened, so we started to come downstairs, but we didn't see any smoke coming out of the windows, so it was quite strange."